fix a minor bug of s_client
fix a minor bug of s_client

CLA: trivial

-CAstore's option should be OPT_CASTORE, instead of OPT_CAFILE
correct also -no-CAstore option from OPT_NOCAPATH to OPT_NOCASTORE

Reviewed-by: Tomas Mraz <973cc78d8b4cb00714230ba9be0225e917ab4ac6@fedoraproject.org>
Reviewed-by: David von Oheimb <fbbca6c63636e78e7034aaf1b4aa3a9736383192@siemens.com>
(Merged from https://github.com/openssl/openssl/pull/11215)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl